Logarithms

[Rachel_Rae]

Solve for x
log base 7 x^3 - log base 7 x
i got
log base 7 (x^3/x)
log base 7 x^2
7^x = x^2
now im stuck

 

[Mrspi]

log base 7 x^3 - log base 7 x
i got
log base 7 (x^3/x)<------you can reduce (x[sup1yypkuw]3[/sup1yypkuw] / x ).....and it does not become x[sup1yypkuw]3[/sup1yypkuw]
log base 7 x^3
7 to what power = x^3
now im stuck

You have not told us what the directions for this problem are. Are you supposed to write this as a single log, perhaps??

There does not seem to be enough information to solve for a value of x..........

 

[Deleted member 4993]

Solve for x
log base 7 x^3 - log base 7 x <<< There's no "equal to" sign here
i got
log base 7 (x^3/x)
log base 7 x^2
7^x = x^2 <<< where did this "equal to" sign come from???
now im stuck

You cannot solve for anything - unless you have an equal to (=) sign in your problem.

 

[Aladdin]

Solve for x
log base 7 x^3 - log base 7 x
i got
log base 7 (x^3/x)
log base 7 x^2
7^x = x^2
now im stuck

Log(a) - log(b) = log(a/b)

log(7x^3) - log(7x) = log(x^2)

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